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0585dfb546
To keep the predicate assignment/propagation logic simple, we assign conjuncts whose underlying base table exprs are constant in at least one union operand to the evaluating MergeNode, and not in the operand(s) whose corresponding base table exprs are constant. The JIRA describes two different bugs: The first bug was that the slots required for evaluating such predicates in the MergeNode were not marked as materialized. The second bug was that predicates 'pushed' into union operands did not get re-analyzed after substituting the predicate's exprs with the result exprs of that union operand. Missing casts lead to a crash. The new test covers both bugs. Change-Id: I0f5b8a366b32f7d4b2587e13793b6103cdf7e8b3 Reviewed-on: http://gerrit.ent.cloudera.com:8080/2162 Reviewed-by: Alex Behm <alex.behm@cloudera.com> Tested-by: jenkins